EP2606554A1 - Fitting magnets to a rotor - Google Patents
Fitting magnets to a rotorInfo
- Publication number
- EP2606554A1 EP2606554A1 EP11736365.5A EP11736365A EP2606554A1 EP 2606554 A1 EP2606554 A1 EP 2606554A1 EP 11736365 A EP11736365 A EP 11736365A EP 2606554 A1 EP2606554 A1 EP 2606554A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- permanent magnet
- fixing means
- stator
- recess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
Definitions
- the present invention further relates to an electric machine and a hand tool with an electric machine with a rotor or stator according to the invention.
- the present invention further relates to a method for producing a particular rotor or stator according to the invention for an electrical machine, with a permanent magnet which is arranged in a recess of the rotor or stator. To a permanent magnet in a recess of a rotor 1 (see Fig. 1) or
- both the rotor core and the permanent magnets extend differently over the temperature range prevailing in the rotor or stator, which is for example in the range from -40 ° to + 160 ° C. Since the clamping nose is formed integrally with the rotor block or with fins 12 of the rotor block, it allows due to the different Temperature behavior and at different component tolerances of the permanent magnet relative to the slats or the rotor block is not sufficient compensation of the temperature behavior and / or the component tolerances of the permanent magnet.
- Object of the present invention is therefore to provide a rotor or stator in which the mechanical stress of a permanent magnet provided in a recess of the rotor or stator is minimized, and at the same time the attachment of the permanent magnet in the recess compensation of occurring component - Tolerances and different temperature behavior of rotor components allows very flexible.
- the fixing means preferably acts in the rotor or stator in such a way that the permanent magnet is fixed in the recess in the radial direction, that is to say in a direction radiating from the rotation axis.
- the permanent magnet is arranged on the side opposite the fixing means substantially free of play in the recess.
- the Axialfix istsstoff causes the permanent magnet in the axial direction, ie in a direction parallel to the axis of rotation, fixed and therefore not along the axis of rotation is displaced. Since, in this embodiment, the axial fixation of the permanent magnet by the axial fixing means in the recess is independent of the radial fixation by the fixing means, a compensation of component tolerances and temperature behavior in the axial direction is independent of a compensation in the radial direction, and therefore different possible .
- the rotor or stator preferably has at least one axial fixing means and at least one fixing means for fixing the permanent magnet in the recess.
- the fixing means additionally acts in the axial direction, so that no additional Axialfix istsstoff must be provided for the axial fixation of the permanent magnet in the recess.
- the elasticity of the fixing means, in particular when forming the fixing means as a spring the spring force of the fixing means, interpretable so that the permanent magnet the fixing means is clamped in the recess, so that it is no longer axially displaceable and thus axially fixed.
- the Axialfix istsstoff and the fixing agent are arranged detachably in the rotor or stator.
- the permanent magnet is forceless inserted into the recess. Powerless in the sense of the invention means that the permanent magnet is not clamped or pressed, but it is inserted, in particular inserted or inserted so that it, in particular its surface and / or a coating of the permanent magnet, thereby mechanically substantially not claimed. As a result, the permanent magnet is not damaged when inserting the permanent magnet in the recess.
- the permanent magnet is fixed radially and / or axially only after insertion into the recess, wherein it further preferably also not damaged by the fixation.
- the material and / or the geometric shape of the fixing means so that the permanent magnet is not damaged by it either during assembly of the rotor or in the operating state, even when in contact with the fixing means.
- the contact area between the permanent magnet and the fixing means is rounded, for example, so that it is as small as possible, and / or the fixing agent is coated so that it has no burrs.
- the fixing means does not directly contact the permanent magnet.
- the rotor or stator preferably comprises a spacer, which is arranged between the fixing means and the permanent magnet.
- the spacer is preferably made of a plastic. But it can also be made of a different material, which preferably has a lower hardness than the permanent magnet, in particular its surface and / or its coating, so as to ensure that the spacer, the permanent magnet, in particular both when arranging in the recess as well as under operating conditions, not damaged.
- a further material is for example a particular synthetic tissue in question.
- the fixing means preferably extends in an axial direction of the permanent magnet, while the axial fixing means is also preferably arranged transversely to the axis of rotation.
- the rotor or stator comprises a rotation shaft rotatable about the rotation axis, wherein the axial fixing means is fixed against axial displacement along the rotation shaft, in particular by means of a retaining lug.
- the axial fixing means secures the permanent magnet against axial displacement along the axis of rotation.
- the permanent magnet on a first and a second end, wherein each Axialfix istsstoff is disposed at the first and at the second end of the permanent magnet.
- the axial fixing agent is preferably a retaining disk.
- the Axialfix istsstoff is resilient or elastic.
- the fixing means is arranged on Axialfix istsstoff, so that the mounting of the fixing means in the rotor or stator is very quickly and easily possible.
- the spacer in particular in the installed state, is arranged on the axial fixing means.
- the fixing means is preferably arranged at the first or second end of the permanent magnet, or it is also preferably two fixing means disposed at the first and second ends of the permanent magnet.
- the Axialfix istsstoff is made of a non-metal, in particular plastic.
- the fixing agent is made of a metal or a plastic.
- the permanent magnet is a flat magnet and also preferably arranged like a spoke in the rotor or stator. Furthermore, it is preferred that the rotor or stator is made as a disk set of a plurality of fins.
- the radial and axial fixation of the permanent magnet in the recess with low-cost fixation and / or Axialfix istsstoffn is ensured that allow a particular independent of each other compensation of component tolerances and temperature changes in the radial and axial directions.
- Synchronous machine comprising a rotor or stator according to the invention.
- the object is further achieved with a hand tool with a motor comprising a rotor or stator according to the invention.
- the object is further achieved with a method for producing a rotor or stator according to the invention for an electric machine, with a permanent magnet which is arranged in a recess of the rotor or stator, wherein the permanent magnet disposed in the recess and thereafter axially and radially in the Recess is fixed.
- the radial fixation is preferably carried out by the fixative and the axial fixation preferably by an axial fixation and / or fixative.
- the method enables powerless placement of the permanent magnet in the recess so that the permanent magnet is not mechanically stressed or even damaged during placement. Only by the arrangement of the fixative and optionally the Axialfix istsmittels is the
- FIG. 1 shows a rotor for a synchronous machine according to the prior art
- Fig. 2 shows schematically a section of an embodiment of a rotor according to the invention in a sectional view
- Fig. 3 shows in Fig. 3 (a) and (b) respectively an embodiment of a
- FIGS. 4 shows another embodiment of an axial fixing means with the fixing means arranged on the axial fixing means, and FIGS. 4 (a) and (b) showing different perspective views of the axial fixing means,
- Fig. 5 shows schematically a section of another
- Fig. 6 shows an embodiment of an axial fixing means for the
- Fig. 7 shows schematically a further embodiment of a rotor according to the invention, wherein Fig. 7 (a) shows a section through the rotor, and wherein Fig. 7 (b) shows the rotor in a perspective view,
- FIG. 4 shows a further embodiment of an axial fixing means 51, wherein the fixing means 52 is arranged on the axial fixing means 51, and wherein the
- the axial fixing means 51 is a holding disk 511, wherein here too
- the Axialfix istsstoff 51 is a retaining plate 511, on the analog of FIG. 5, a plurality of pins 522, at least in the radial direction as a fixing means 52 Direction act, are arranged.
- the pins 522 are integrally formed with the holding plate 511 in the embodiment shown here.
- the holding plate 51 1 has for its axial fixation on the rotary shaft 22 retaining lugs 512.
- the spring strand 520 shown here has an advantageous geometric shape, since it in the contact areas between the permanent magnet 3 and the springs 521 and in the contact areas between the permanent magnet 3 and the clasps 513 is rounded so that it is as small as possible. In addition, it has no burrs due to its rounded shape in the contact areas.
- the spring strand 520 is preferably made of a material which is softer than the material from which the permanent magnet 3 is made, since it rests directly on the permanent magnet, and / or the spring strand 520 is additionally coated with such a material. This prevents the permanent magnet 3 from being damaged by the spring strand 520.
- An inventive rotor 1 has the advantage that the particular independent axial fixing of the permanent magnet 3 in the recess 4 of the radial fixation of the permanent magnet 3 in the recess 4 allows a very flexible compensation of component tolerances and temperature behavior of the components. Furthermore, the permanent magnet 3 is powerless inserted into the recess 4. As a result, it is not damaged during insertion, in particular its coating, for example made of epoxy or Ni-Cu-Ni. Furthermore, the fixing means 52 and the Axialfix istsstoff 51 so providable that the permanent magnet 3 is not damaged by the fixings 51, 52 even under operating conditions.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010039334 DE102010039334A1 (en) | 2010-08-16 | 2010-08-16 | Attaching magnets to a rotor |
PCT/EP2011/062878 WO2012022589A1 (en) | 2010-08-16 | 2011-07-27 | Fitting magnets to a rotor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2606554A1 true EP2606554A1 (en) | 2013-06-26 |
EP2606554B1 EP2606554B1 (en) | 2019-02-27 |
Family
ID=44629124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11736365.5A Not-in-force EP2606554B1 (en) | 2010-08-16 | 2011-07-27 | Magnet rotor mounting |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2606554B1 (en) |
DE (1) | DE102010039334A1 (en) |
WO (1) | WO2012022589A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011080948A1 (en) | 2011-08-15 | 2013-02-21 | Robert Bosch Gmbh | Rotor i.e. spoke rotor, for use in synchronous motor that is installed in electric drive unit of motor car, has retaining ring formed in annular form, and resilient attachment unit partially resting on permanent magnet |
DE102012206475A1 (en) | 2012-04-19 | 2013-10-24 | Robert Bosch Gmbh | Molding for prefixing a permanent magnet in a rotor or stator, fixing the permanent magnet by means of a curable medium, and thermal protection of the permanent magnet during fixation |
DE102012206424A1 (en) * | 2012-04-19 | 2013-10-24 | Robert Bosch Gmbh | Permanent-magnet electric machine |
FR2991118B1 (en) * | 2012-05-24 | 2015-11-13 | Valeo Equip Electr Moteur | ELECTRIC MACHINE ROTOR AND DEVICE FOR MAINTAINING PERMANENT MAGNETS |
DE102012218343A1 (en) | 2012-10-09 | 2014-04-10 | Robert Bosch Gmbh | Clamping means for mechanically fixing magnets in a spoke rotor |
FR3002091B1 (en) | 2013-02-14 | 2016-07-15 | Moteurs Leroy-Somer | ROTATING ELECTRIC MACHINE. |
ITBS20130104A1 (en) * | 2013-07-17 | 2015-01-18 | I M E S P A Ind Motori El Ettrici | ENGINE GROUP |
JP6464822B2 (en) | 2015-02-27 | 2019-02-06 | 日本電産株式会社 | motor |
DE102015207663A1 (en) | 2015-04-27 | 2016-10-27 | Schaeffler Technologies AG & Co. KG | Rotor of an electric motor |
EP3371874B1 (en) * | 2015-11-06 | 2020-04-01 | Arçelik Anonim Sirketi | Magnet retainer for use in an electric motor |
FR3060891A1 (en) * | 2016-12-21 | 2018-06-22 | Valeo Equipements Electriques Moteur | ROTATING ELECTRIC MACHINE COMPRISING MAGNET HOLDING ELEMENTS |
DE102017204467B4 (en) * | 2017-03-17 | 2020-08-06 | Bühler Motor GmbH | Permanent magnet rotor |
FR3069973A1 (en) * | 2017-08-02 | 2019-02-08 | Valeo Equipements Electriques Moteur | ROTOR OF ROTATING ELECTRIC MACHINE HAVING A FLANGE HAVING FUNCTION FOR HOLDING PERMANENT MAGNETS |
KR102132900B1 (en) * | 2018-12-20 | 2020-07-14 | 계양전기 주식회사 | Rotor assembly for spoke type motor |
DE102019124838A1 (en) * | 2019-09-16 | 2021-03-18 | Bühler Motor GmbH | Rotor and centrifugal pump with rotor |
CN116979721A (en) * | 2022-04-24 | 2023-10-31 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Rotor for an electric motor |
EP4293875A1 (en) * | 2022-06-15 | 2023-12-20 | Vorwerk & Co. Interholding GmbH | Electric motor, food processor and assembly method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4447880B4 (en) * | 1994-07-07 | 2007-09-20 | Indramat Gmbh | Radial magnetic motor |
JP2004357418A (en) * | 2003-05-29 | 2004-12-16 | Honda Motor Co Ltd | Permanent magnet fixing structure in rotor for rotating electric machine |
ITBO20050437A1 (en) * | 2005-06-30 | 2007-01-01 | Spal Automotive Srl | ROTOR FOR ELECTRIC MACHINE |
DE102007015249A1 (en) * | 2007-03-27 | 2008-10-02 | Miele & Cie. Kg | Rotor, in particular for an electric motor of a circulating pump |
-
2010
- 2010-08-16 DE DE201010039334 patent/DE102010039334A1/en not_active Withdrawn
-
2011
- 2011-07-27 EP EP11736365.5A patent/EP2606554B1/en not_active Not-in-force
- 2011-07-27 WO PCT/EP2011/062878 patent/WO2012022589A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012022589A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102010039334A1 (en) | 2012-02-16 |
EP2606554B1 (en) | 2019-02-27 |
WO2012022589A1 (en) | 2012-02-23 |
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Inventor name: KRITHARIDOU, STAVROULA Inventor name: NOMMENSEN, BJOERN Inventor name: STOERMER, STEFAN Inventor name: KUPKE, NORBERT Inventor name: ZERNIKOW, MAIK Inventor name: KLATTE, HOLGER |
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